Pressure-release valve



P. DoR'sEY r-:T Al.

PRESSURE RELEASE VALVE Filed Aug. 12, 1921 Patented 8, 1929i. v

UNITED STATES.

PATENT OFFICE..

PAmmnjnonsEY, OI' wICIIIrA, xANsAs, AND ROBERT D. McIN'rOsII, or Ervan'. ronns'r, ILLINOIa AssIGNOns 'Io 'rmi IMPERIAL BnAss MANUFACTURING COMPANY, or

C IIICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

PRESSURE-RELEASE vALvE.

Appnauon mea August 12, 192i. serial No. 491,651.

' Our invention is lconcerned with pressure valves, and more especially with safety valves in which the valve is opened automaticall and the pressure released in case it passes a ove a certain point, and it is concerned-primarily with such a valve having also a manual release for the spring pressure, so thatevery time it is operated manually to relieve the spring pressure the safety valve will be unseated, thereby insuring that it will not be stuck if it is ever called upon to function as a safety valve. i

Our invention is inallypconcerned with a pressure release valve so constructed Athat whenever the valve is Opened manually it is positively lifted from its seat to prevent any possibility of itsI sticking;

To illustrate our 1nvention,"we have ,an-

nexed hereto a sheet of drawings, in which the I same reference characte-rs are used to designate identical partsI in all the figures, of which- Fig. 1 is a central longitudinal section through the valve with the handle turned so that the pressure is released; and

Fig. 2`isa view in section on the line 2-2` of Fig. 1.

In carrying out our invention in its preferred form, we employ a valvecasing con- .sisting of two halves, 11 Aand 12, each half,

'being circular in cross-section throughout most of its length and the two castings having their adjacent ends hollowed out to form a chamber on each side ofthe diaphragm 13, .which is clam d between the annular flange lalcarried by t e portion 12 of the casing and the annular flange 15 carried by the vother portion, land preferably' overhanging the same as shown, the two halves beingclamped together with the periphery of the diaphragm 13 andthe annular gasket 16 being clamped ly with the axis thereof is the annular seator between them by the screws'l'?. The 'casing 12 is provided with the`internally threaded inlet 18, preferably extending radially therefrom, 'and located Ton .the lcasing 'concentrical- 'ange 19 onwhich is adjusted in any desired position the outletsleeve 20, whichhas thethreaded outlet aperture 21 on one vside thereof, which aperture can be directed at any desired angle tothe inlet 18 by simply turning the sleeve on its seat, where it isV secured the lock-nubi 22 (sooperating with the central position by binding the same sli threads 23 on the outer end Of the hollow plug l 24, Vthe threaded inner end of which is screwed into the outlet passage formed in the casing 12 and which is preferably seated against the I small annular ange 25 formed at the end of the passage in -which the plug24 is screwed.. Anannular channel 26 isformed in the inner 7 end of the plug andhas seated therein the annular flange seat 27 which is composed of rubber or some similar substance or composition. The hollow cylindrical plug 24 has'the l openings 28 in its sides so that the gas can pass out through the port-21 in any position j of the plug which has it outer end 29 made square or hexagonal, so that, a wrenchcan edge f of a' disk secured on the internally threaded splitlsleeve 32.l This sleeve after it is split is deformed slightly by permanentnarrowed at its outerl end so that as it is adj usted on the reduced threaded end 33 of the diaphragm' engaging plug `as hereinafter de- 1 scribed, it cannot accidentally turn and (lestroy thead'ustment.` This 'diaphragm-en'- .gaging plug as-the disk-shaped end 34 with its face adjacent the diaphragm 13 curved as shown, to co-operate with 'the diaphragm, which is heldagainst it by the lock-nut35 ly compressing its end so that the split is f ofthe disk 34 is shaped so that when it is forced toward the valve seat, lthe diaphragm 13 will be compelled to assume the positlon shown in dotted lines in Fig'. 1, in which posi- 55 tion the diaphragm has been swung pasthtllie fly at the annularl offset 39, which is provi ed` in the diaphragmlfor this purpose. With this construction of the diaphragm, it tends tore- ,main either'in the full line or the Idottedline positions shown'in 1L For the purpose of applying any desired"v i f t e pressure to the outer face o 13, i. e., the lone in the portion 11 of the casing we preferablyjemploy the -helically coiled expanding spring 40 1 diaphragm which is interposed he,`

tween the adjacent face ofthe disk 34 and the annulus 41, angular in crossesection, which is spaced at ,any desired distance from the end 42 of the cylindrical extension 43 of the half l1 of the casingA by the washers 44, and it will be understood that as many of these washers 44 are employed as are necessary to secure the desired tension of the spring 40 when the valve 31 is in Contact with itsI seat 27. The

l0 annulu's 41 is preferably supported 011 the i reduced portion 45 of the sleeve 46, which has the hexangular central portion 47 to which a wrench may be applied, and which. has

its threaded portion 4S screwed into the correspondingly threaded end 42. By varying the number or thickness of the washers 44 it will be obvious that the tension of the spring 40 may be increased or diminished to furnish any desired pressure on the diaphragm 13.

The mechanism thus far described fur-v nishes a safety release valve, but in order that the same may be released manually, we preferably provide the following mechanism:

Threaded into a recess in the center of the disk 34 is the end of the rod 49, which fits loosely in and extends through the sleeve 50 which hasthe handle 51 rig-idly secured near the outer end thereof.l The handle has the annular extension 52 projectingr therefrom into the cylindrical cap 53 'provided with the hexagonal flange 54 to which a wrench may be applied to screw the cap on to the threads 55 provided on the handle adjacent the exten sion 52'. The rod 49 has rigidly secured on its threaded outer end the nut 56, which is provided with a pair of diametrically opposed lugs 57 preferably substantiall semicircular in cross-section and designe to cooperate either with the shallow recesses 58 or 0. with the deeper-recesses59 formed in the outer face of the extension 52, preferably at right angles to the recesses 58. lVhen the valve is in operation, ,the handle 51 is turned at right angles to the position shown in Fig.

1, in which position the lugs 57 enter thel deep recesses 59 and allow the spring 40 to force the valve 51 into engagement with the valve seat 27. When the pressure is to be released,

the handle 51 is turned to the full line position of Fig. 1, where the lugs 57 engage the shallow recesses holding the valve out of engagement with its seat. Y We prefer to make "the chamber in the half 11 of the casing airtight, so as to prevent the escape of gas into the room, if the diaphragm 13 should, be rup-v tured, and for this purpose, we place packing i 60 within the sleeve 46, and this packing is forced into the angle 61 formed in the inner A end/of the sleeve 46 by the collar 62, which 60 has at its inner end. the similar angle 63 and at its outer end a Harige 64 which is engaged by the gland Anut 65 which is screwed on to the threaded outer end of the sleeve 46.

As it is desirable to adjust the position of lli the valve 31 relative to its seat and the diaphragm without disasselnbling the casing, for this purpose we provide in the center of the valve disk 31v the slot 66, which is adapted to receive the working end of a screw-driver, which` cali be inserted through the aper-I ture 67 formed in the outer end of the 4plug 34 when the closing screw 68 threaded there v in has been removed for this purpose.

The operation of the foregoing valve will be readily apparent. Assuming that the parts are in the position shown in dotted lines in Fig. 1, and .that the pressure of the gas reaches the danger point, this pressure will lift the valve '31 against the pressure of the spring 40 without entirely freeing it from its seat until the diaphragm 13 has been moved past its center, at which time the spring action of the diaphragm serves to augment the pressure of the gas which has been suflicient to counterbalance the pressure of the spring l40, so that the sprin action serves to moveit suddenly clear of t e seat 27 and allows the valve to open wide and the gas to be released rapidly, instead of slowly in the manner in which the ordinary rehef valve o erates. When the handle 51 is turned to the line `position shown in the drawings, the valve 31 is positively drawn away from its seat against Y the resistance of the spring 40, thereby opening it widely and securing a very quick release 95 of the pressure.

Under some conditions, we may prefer to connect the chamber in the half 11 of the casing with the outlet '21, as indicated in dotted lines, where a boss 69 is formed on the half 11 of the easing, and has the elbow 70 screwed therein and connected by the short threaded pipe 71 with the union 72, which in turn is connected bv the short threaded pipe 73 with the T 74 which is threaded on tothe outlet 2l. This by-pass construction, in case of a rupture of the diaphragm 13 permitsthe gas, A which would otherwise tend to leak outdnto the room, to vilow freely into the outlet pipe which will be connected with the T 74.

While we have shown and described our invention as embodied in the f orm which we at present consider `best adapted to carry out its purposes, it will be understood that it is capable of modifications, and that we do not desire to be limited in the interpretation of the following claims, except as may be necessitated by the state of the prior art.

What we claim as new and desireto secure by Letters Patent of the United States is:

1. In a pressure operated release valve, the combination with a casingfof a diaphragm covering a chamber in said casing, an inlet to said chamber, an outlet for the chamber assoeiated with said casing, a valve seat in said "125 outlet, a valve cti-operating with the seat, -means for ap lyin any desired prsure to the outside of) the diaphragm, andV threaded econnections between the valve and the dias phragm comprising an l tion extending at an angle to the interme nasales..

split sleeve carried by one of them deformed onto a threaded bolt on which it is screwed carried by the other. s

`2. In apressure operated release valve, the combination with a casing, of a dia. hragm forming one side of a chamber in sai casing,

an inlet to said chamber, adapted when in use to be connected to a pi e, anoutlet passage from the chamber embo ying an intermediate ortionwhese axis .is lat right ahgles to the ace of the diaphragm, and a final outlet (ponportion and adapted when in useto be connected to a pipe, a hollow member carrying at its innerend a valve seat secured in sa' intermediate portion, va valve lcooperating with said seat and provided'with means for engagement by an adjusting tool, means for applying any desired pressure to the outside ofthe dia hragm, a stud projectin from the center of t e diaphragm upon whic the valve -is threaded tightly to prevent any movement thereon when the valve is in use, although permitting the valve to be .turned thereon for adjustment to and'fromthe diaphragm by an adjusting tool applied thereto, and a gas tight.

lug removably secured in the hollow memer 1n axial alinement with the valve and ,stud

' so that by removing the plu the valvecan l ing-or displacing the valve seat.

be` adjusted to and from the dlaphragm without disconnecting any of the connected pip- 3. In a pressure operated release valve, the

. combination with a casing, :of a diaphragm interposed between two chambers insaid casing, an inlet to one of said chambers, .an out- 'let for the same chamber associated with said casing, a valve seat in said outlet, a .valve c0- .operating with the seatandzconnected to the diaphragm a spring for applying any de'- sired pressilre to the other side of thezdiaphragm located in the other chamber, 'a rotatable sleeve extending through said other chamber, a rod'inside' of the sleeve and ex'-' tendin through the spring to theldiahragm, a cam ug on the outer` end of the ro a cam A depression in the outer end of the sleevecooperating therewith and a handle attached to for the4 purpose described.

Y '4. In a pressure-operated release valve,

the sleeve for rotating it,subs'tantially as and 'the combination with a `casing, of a diaphragm;

covering a chamber in said casing, an irflet to said chamber, an outlet for the chamber associated with said casing, a valve seat in said.

outlet, a valve cooperatingwith the seat and ate connected tothe diaphragm, as ring for applying any des'red pressure to't e outside ofM the diaphragm, a casing for the sprin a handle, a sleeve attached to the handlean ro.- tating therewith2 and extending through a packed bearinginto the spring casing, and connections between the handle ,and the spring for quickly compressing thelattcr an pulling the valve from its seat.

- 5. In a pressure-operated release valve, the.

combination with a casing, of a diaphragm Asecured therein and dividing it into two hermetically separated-chambers, an inlet to the irstof said chambers, an outlet from the same chamber, a valve seat in said outlet, a valve cooperating' with the seat and connected to-'the dia hragm so as to be moved thereby, means int e second/chamber to apply any desired pressure ;to tlijat side of the diaphragm and 75 tending to keep the valve seated,`a sleeve closed at its outer end and extendin through a packed' bearing into said second c amber a handle attached to said sleeve to rotate the s 'same; and connections between said handle and the diaphragm enclosed by the sleeve for quickly-moving the diaphragm against said pressure means to lift Ithe valve from its seat.

6. Ina pressure-operated release `valve, the combination with a casing, of a diaphragm secured therein and dividingV it into two` hermetically separated chambers, an inlet to the first of said chambers, an outlet from the same chamber, a valve seat in said outlet, a

valve co-o rating with the seat and connected to ediaphragm so as to be moved thereby, means in the second chamber` to a ply any desired pressure to that side of t e to the diaphragm at one 'end and having a cam surface at the other end, and a co`op erating cam surface carried within the sleeve to move the rod longitudinally when the` sleeveis rotated. I i

In', witness whereof, we have hereunto set our hands this 26th da of Jul A. D. 1921. PAR R DO SEY.-

lil-5 noBn'r-D. Mom'rosn. 

